tuples

问题 So, I'm working on a Pybrain-type project and I'm stuck on part of it. So far the program takes in a tuple and assigns a variable to it using 'one of them fancy vars()['string'] statements. Specifically, it takes in a tuple of numbers and assigns it to a ' layerx ' value, where x is the number of the layer (in order, layer 1, 2, 3, etc), such that the numbers are the dimensions of that layer. The part of the program I desperately and humbly come to you for help in is what should be the next

问题 When I print the tuple (u'1S²') I get the predicted output of 1S² However, when I print the tuple (u'1S²',u'2S¹') I get the output (u'1S\xb2', u'2S\xb9') . Why is this? What can I do about this? Also, how do I get the number of items in a tuple? 回答1: The expression (u'1S²') is not a tuple , it's a unicode value. A 1-tuple is written in Python this way: (u'1S²',) . The print value statement prints a str(value) in fact. If you need to output several unicode strings, you should use something

问题 I have an error, when I try to build my .net 4, c# project. Everything works great, but when I add an external reference to a given DLL, it stops working, it can't build, throws this type of some errors: Error 36 The type 'System.Tuple' exists in both 'C:\Program Files\Reference Assemblies\Microsoft\Framework.NETFramework\v4.0\mscorlib.dll' and 'C:\Projects\Project1\ExternalRefernces\SharpSNMP\SharpSnmpLib.dll' C:\Projects\Project1\CheckerStore.cs 17 21 Note, I did not do anything with the

问题 I have a knowledgebase that looks something like this fact1(1, _, a, _, _). fact1(2, _, c, _, _). fact1(3, _, d, _, _). fact1(4, _, f, _, _). fact2(_, 1, b, _, _). fact2(_, 2, c, _, _). fact2(_, 4, e, _, _). For every fact1 & fact2 , where (in this example) the numbers match up, I want to have a list of the corresponding letters as tuples. I would like to use findall/3 and only one predicate for this. I have asked a question here before on how to solve something similar, where the answer was

问题 I have this code: def make_service(service_data, service_code): routes = () curr_route = () direct = () first = service_data[0] curr_dir = str(first[1]) for entry in service_data: direction = str(entry[1]) stop = entry[3] if direction == curr_dir: curr_route = curr_route + (stop, ) print((curr_route)) When I print((curr_route)), it gives me this result: ('43009',) ('43189', '43619') ('42319', '28109') ('42319', '28109', '28189') ('03239', '03211') ('E0599', '03531') How do I make it one tuple

问题 I have two list of tuples a = [('head1','a'),('head2','b'),('head3','x'),('head4','z')] b = [('head5','u'),('head6','w'),('head7','x'),('head8','y'),('head9','z')] I want to take the intersection of 2nd element of each tuple for example set {a[0][0],a[0][1],a[0][2],a[0][3]} intersection with set {b[0][0],b[0][1],b[0][2],b[0][3],b[0][4]} from list a and b such that it returns the first element mapping of the tuple if intersection value exist. The resulting output should be like following: res

问题 I have an XML like this: <?xml version="1.0" encoding="Windows-1252"?> <!--XML Songs Database.--> <Songs> <Song><Name>My Song 1.mp3</Name><Year>2007</Year><Genre>Dance</Genre><Bitrate>320</Bitrate><Length>04:55</Length><Size>4,80</Size></Song> <Song><Name>My Song 2.mp3</Name><Year>2009</Year><Genre>Electro</Genre><Bitrate>192</Bitrate><Length>06:44</Length><Size>8,43</Size></Song> <Song><Name>My Song 3.mp3</Name><Year>2008</Year><Genre>UK Hardcore</Genre><Bitrate>128</Bitrate><Length>05:12<

问题 I see this: Scalding: How to retain the other field, after a groupBy('field){.size}? it's a real pain and a mess comparing to Apache Pig... What do I do wrong? Can I do the same like GENERATE(FLATTEN()) pig? I'm confused. Here is my scalding code: def takeTop(topAmount: Int) :Pipe = self .groupBy(person1){ _.sortedReverseTake[Long](activityCount -> top, topAmount)} .flattenTo[(Long, Long, Long)](top -> (person1, person2, activityCount)) And my test: "Take top 3" should "return most active

问题 I need to get some values of facts. That part seems to be working. fact1(A, _, Val1, _, _), fact2(_, B, Val2, _, _), A = B, But as soon as I try to append these values [(Val1,Val2)] to the List(OutList) by using the append/3 predicate, I only get one possible solution back instead of a list with all of them. Appending like this: append(OutList, [(Val1,Val2)], OutList) doesn't work either. I feel like I am missing something fundamental here. This is what my predicate looks like so far.

问题 I have a C++11 tuple, and I would like to get a tuple of std::reference_wrapper s to the same elements of the tuple. Is there an easy way to do that? Thanks 回答1: Mapping a tuple is easy given a pack of indices, e.g.: #include <tuple> #include <functional> #include <iostream> template <int...> struct Seq {}; template <int n, int... s> struct Gens : Gens<n-1, n-1, s...> {}; template <int... s> struct Gens<0, s...> { typedef Seq<s...> Type; }; // The above are taken from https://stackoverflow